Sacramento Is Ghost Gun Central Apparently

Leeland-Yee-De-Leon-Ghost-Gun-PalsManufacturing and selling in mass quantities?  345 guns seized in one case!  Legit serial numbered lowers are under $100, so obviously the criminal element were the customers.  If they are doing something illegal with it, it’s not like they care that it has a serial number or not on it anyway… this just made it easier to get because they wouldn’t have to get a stolen one etc…  I just don’t understand how the guy(s) at the Sacramento machine shop they busted could have thought this was a good idea in any capacity.  Probably just are so dumb, they thought they were too smart to get caught is my guess.

Thoughts?